CVW 7074 User manual

Thunder
Full HD
High Definition
Line In/Out Streaming
IP
Ultra Low
Latency
Range
1000m
Through
Wall Ability
This user manual applies to:
Transmitter: 7074/7074A
Receiver: 3074/3074A
USER MANUAL
Version: 1.0
2020.09.18
Excellent Non-Line-Of-Sight Transmission Performance
SHENZHEN CRYSTAL VIDEO TECHNOLOGY CO.,LTD
E-mail: [e-mail]
Post code：518057
Tel: [phone]
www.cv-hd.com
Facebook:@crystalvideowireless Instagram: cvwtechnology
ADD: Unit 05-06, Floor 24, Changhong Science & Technology Mansion, Keji 12th Road South,
High-tech Industrial Park, Nanshan District, Shenzhen, P.R. China

01
01
02
03
07
03
05
07
09
01
About the User Manual
Product Features
Brief introduction
Packing List
Structure & Interface
Wireless HD Transmitter 7074
Wireless HD Receiver 3074
Product Installation
Wireless HD Transmitter 7074
Wireless HD Receiver 3074
Contents
Specification
Product Application
14
19
12
20
Functional Instructions
Precautions

01 02
RS232 transparent transmission
This product supports RS232 transparent transmission, which is convenient for
users to control the transmitting terminal through the device at the receiving
terminal, such as the PTZ.
About This Manual
This Manual details the product specifications, instructions for use,
precautions, and troubleshooting. Read the Manual carefully before using
the product. If you have any questions or difficulties in using this product,
contact the Company or the seller in time.
Product Features
Brief Introduction
High-quality low-latency video footage
This product supports HD-SDI&3G-SDI input and output as well as HDMI full-HD
input and output, with the highest resolution of 1080P/60Hz. With the use of H.264
coding-decoding technology with high compression ratio and high definition, the
images have high definition, and the latency is as low as 70ms.
V-Mount battery, NP-F battery and non-line-of-sight transmission features
This product is designed based on 1.4Ghz wireless network technology. The lower
frequency makes it have better penetrating characteristics and can be transmitted
under non-line-of-sight conditions, and this frequency is not easy to be interfered
by the external environment.
Point-to-point mode and streaming mode
This product supports switching between two operating modes, namely point-to-
point mode and RTSP streaming mode. In point-to-point mode, the video output
interface is HDMI or SDI. In RTSP streaming mode, the video streaming interface
is RJ45 network interface. There are more options for different applications.
* Do not use this product for a long time in the sun or dusty place.
* Be sure to use this product within the temperature and humidity ranges.
* Do not operate the product under vibration or strong magnetic fields.
* Do not put conductive materials in the product vents.
* Do not open the product yourself without the guidance of our professionals.
Thank you for choosing CVW's professional wireless HD audio
and video transmission product. Read the following precautions
carefully before using this product:
* Before power-on, make sure that the adapter input voltage is AC110V-220V,
and that the output voltage and current meet the product specifications.
* Before power-on, make sure that the antenna is installed.
Thunder is a wireless HD video transmission device with Tally and camera PTZ
control, non-line-of-sight transmission features, supporting up to 1080P/60Hz
video resolution. This system is based on 1.4Ghz 7074+3074 700/800MHz
(7074A+3074A) wireless network technology for transmission. Image processing
is performed using H.264 coding-decoding technology, and thus the images are
clearer and the latency is lower.It can be widely used in live events, concerts,
sporting events, education, churches, etc.

Packing List
The following items are included in the product package.
Transmitter *1 Antenna *2 SDI cable *1 Double Ball Head
Arm Mount *1
Power supply
cable *1
Receiver *1 Antenna *2 SDI cable *1 Power adapter
(12V/2A) *1
Transmitter *1 Antenna *2 SDI cable *1 Double Ball Head
Arm Mount *1
Power supply
cable *1
Receiver *1 Antenna *2 SDI cable *1 Power adapter
(12V/2A) *1
NPF-Type V-Mount
03 04
Note: The transmitter and receiver are equipped with a SONY NPF battery plate. Note: The transmitter and receiver are equipped with a V-Mount battery plate; In addition,
the transmitter will be equipped with a V-mount support plate.

TX: 7074(NPF-type) SDI LOOP Out SDI In
RS232
MODE RESET LAN
Structure & Interface OLED Display
DC-IN
Power Switch
LINE In HDMI In
Tally out
Transmitter Key Operation
RES ET
MOD E
2
3
4
5
6
7
8
9
1
10
11
12
13
12345
68910
11 12
7
13 NP-F Battery Interface 14
14
Antenna Interface
Button Operation Description
MODE
RESET
During the restart of the coding-decoding
board, the “RESET” string will always be
displayed on the OLED display, and the
string will disappear after the restart.
When switching to streaming mode,
the word “RTSP” will be displayed on
the OLED display, and the product will
enter streaming mode.
Thunder NPF-type
Thunder V-mount
05 06
Channel switching：
Press and hold the
“MODE” button for
about 3s.
Only 800M (7074A+3074A) item is valid.
After switching the channel, the machine
needs to be manually restarted to take effect.
Besides, the transmitter and receiver need to
be switched to the same channel to connect.
Switching between
RTSP mode and point-
to-point mode：Press
and hold the “MODE”
button for about 6s.
Note: Defaults to point-
to-point mode.
Switching between
external audio mode
and embedded audio
mode：Press and hold
the “RESET” button for
about 3s.
Restart of the coding-
decoding board:
Press and hold the
“RESET” button for
about 6s.
External audio mode: MIC icon on;
Embedded audio mode: MIC icon off.

RES ET
MOD E
2
3
4
5
6
7
8
9
1
10
11
12
13
RESET LAN
12345
68910
11 12
7
13 14
14
TX: 7074(V-mount )SDI LOOP Out SDI In
RS232
MODE
OLED Display
DC-IN
Power Switch
LINE In HDMI In
Tally out
Antenna Interface
V-mount
07 08
Transmitter Key Operation
Button Operation Description
MODE
RESET
During the restart of the coding-decoding
board, the “RESET” string will always be
displayed on the OLED display, and the
string will disappear after the restart.
When switching to streaming mode,
the word “RTSP” will be displayed on
the OLED display, and the product will
enter streaming mode.
Channel switching：
Press and hold the
“MODE” button for
about 3s.
Only 800M (7074A+3074A) item is valid.
After switching the channel, the machine
needs to be manually restarted to take effect.
Besides, the transmitter and receiver need to
be switched to the same channel to connect.
Switching between
RTSP mode and point-
to-point mode：Press
and hold the “MODE”
button for about 6s.
Note: Defaults to point-
to-point mode.
Switching between
external audio mode
and embedded audio
mode：Press and hold
the “RESET” button for
about 3s.
Restart of the coding-
decoding board:
Press and hold the
“RESET” button for
about 6s.
External audio mode: MIC icon on;
Embedded audio mode: MIC icon off.

RX: 3074(NPF-type)
Receiver Key Operation
Button Operation Description
MODE
RESET
During the restart of the coding-decoding
board, the “RESET” string will always be
displayed on the OLED display, and the
string will disappear after the restart.
Antenna Interface
2
3
4
5
6
7
8
9
1
10
11
12
13
Line out
12345
68910
11 12
7
13 14
14
RES ET
MOD E
RESET LAN
SDI Out
RS232
MODE
OLED Display
DC-IN
Power Switch
HDMI Out
Tally In
SDI Out
NP-F Battery Interface
09 10
Channel switching：
Press and hold the
“MODE” button for
about 3s.
Only 800M (7074A+3074A) item is valid.
After switching the channel, the machine
needs to be manually restarted to take effect.
Besides, the transmitter and receiver need to
be switched to the same channel to connect.
Restart of the coding-
decoding board:
Press and hold the
“RESET” button for
about 6s.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
RES ET
MOD E
RX: 3074(V-mount )
Antenna Interface
Line out
12345
68910
11 12
7
13 14
RESET LAN
SDI Out
RS232
MODE
OLED Display
DC-IN
Power Switch
HDMI Out
Tally In
SDI Out
V-mount
Receiver Key Operation
11 12
Button Operation Description
MODE
RESET
During the restart of the coding-decoding
board, the “RESET” string will always be
displayed on the OLED display, and the
string will disappear after the restart.
Channel switching：
Press and hold the
“MODE” button for
about 3s.
Only 800M (7074A+3074A) item is valid.
After switching the channel, the machine
needs to be manually restarted to take effect.
Besides, the transmitter and receiver need to
be switched to the same channel to connect.
Restart of the coding-
decoding board:
Press and hold the
“RESET” button for
about 6s.

2. If using battery, equip to the transmitter(as shown in the picture).
Installation of V-Mount Battery
Product Installation
For Transmitter
Transmitter(NP-F)
Battery
Transmitter+Battery
V-Mount Battery
Transmitter(V-mount)
13 14
1. Please install all the antennas on the transmitter (as shown in the picture).
Installation of NPF Battery

H D M I
S D I H D M I
3. Please fix the transmitter via
the screw at the bottom or the
V-mount at the back, and place
it at a height of around 1.5 to 2
meters above floor (as shown
in the picture).
Transmitter at a height of
around 1.5 to 2 meters
above floor.
4. Please connect the transmitter and camera with SDI or HDMI cable (as shown
in the picture).
SDI In
HDMI In
For Receiver
15 16
1. Please install all the antennas on the transmitter and place it upright
(as shown in the picture).
2. If using battery, equip to the receiver(as shown in the picture).

00:00:00
H D M I
S D I H D M I
Receiver(NP-F)
Battery
Receiver+Battery
Receiver(V-mount)
3. Please fix the transmitter via
the screw at the bottom or the
V-mount at the back, and place
it at a height of around 1.5 to 2
meters above floor (as shown in
the picture).
Receiver at a height of
around 1.5 to 2 meters
above floor.
4. Please connect the receiver and camera with SDI or HDMI cable (as shown
in the picture).
SDI Out
HDMI Out
17 18
V-Mount Battery
Installation of V-Mount Battery
Installation of NPF Battery

In point-to-point mode, the video source is sent to the transmitter via HDMI or SDI.
The receiver will transmits the video signal to display device via HDMI or SDI.
Point-to-point mode
Application Mode
HDMI/SDI
Camera ReceiverTransmitter
1000m/3280ft
HDMI/SDI
MonitorSwitch Console RTSP
Live Streaming network Live Streaming network
19 20
Power the Devices
Power the transmitter and receiver with DC adapter or battery.
The receiver’s OLED screen will display “connecting to transmitter” before the
wireless connection is built .
The receiver's OLED screen will display “link up with transmitter, please check
video source”. Once the connection between the transmitter and the receiver is
built successfully. Video will appear on the monitor within a few seconds. It is
estimated that it will take 1 minute from powering on the product to displaying
the real-time image.

RJ45
Low level is Effective trigger signal to the receiver. The Tally light will illuminate
once the receiver's Tally input receives low-level signal.
Streaming mode
In streaming mode, the video source is sent to the transmitter via HDMI or SDI.
The receiver receives the video signal from the transmitter and send it to the
Switch Console/PC via RJ45 port.
Camera Transmitter Receiver
1000m/3280ft
Switch Console
Live Streaming network
HDMI/SDI
RTSP
Live Streaming network
Functional Instructions
Tally function
1
2
3
4
5
6
J16
PHONEJACK STEREO SW
RCLamp0521PA
D13
D12
RCLamp0521PA
Tally_Red
Tally_Green
Tally Light Output Interface:
Tally Input Interface:
21 22
The Tally port is a standard 3.5mm headphone port.

1
2
3
4
5
6
J16
PHONEJACK
STEREO SW
RCLamp0521PA
D13
D12
RCLamp0521PA
Tally_Red
Tally_Green
RS232/RS422 transparent transmission
Name Description
NC NC
P12V
1
2
NC NC
TXD
3
4
GND
RXD
5
6
1 3
2
456
RXD-
P12V
TXD-
TXD+
GND
RXD+
RS232 RS422
This interface defaults to RS232 function. For RS422 function, contact the
sales staff in advance for customized information!
Pin No Name Description
No voltage output by default
(Reserve 12V voltage output)
Transmit data TX
Ground
Receive data RX
Receive data RX-
No voltage output by default
(Reserve 12V voltage output)
Transmit data TX-
Transmit data TX+
Ground
Receive data RX+
Log in to the backplane parameter settings page to change the baud rate settings:
(For specific operating steps, refer to “Video Parameter Settings”)
Attached: Baud rate settings
Description:
Streaming Function
When using the functions in streaming mode, the transmitter needs to
switch to streaming mode. At this time, the word “RTSP” is displayed
on the transmitter’s OLED display, the SDI and HDMI at the receiver have
no video output, and the image is transmitted to the streaming media
software through the LAN port of the receiver for decoding display.
The streaming mode depends on software decoding. Comply with lots
of streaming media software. The following is an example of common VLC
streaming media software:After the transmitter and receiver establish a
network connection, the transmitter network indicator is always on,
the receiver network connection is normal; the transmitter is connected to
the HDMI or SDI video source, and the receiver’s network port is connected
to the streaming device.
Take the VLC of the PC as an example. After running VLC, select to turn on
the network stream.Fill in the address “rtsp://corresponding transmitter
encoding board IP address/media/live/0”. Click “Play” to start streaming.
Note that the transmitter must be connected to the video source, and the
IP address of the terminal streaming device (such as a computer) must be
the same network segment as the IP address of the encoding board.
Otherwise, the streaming will fail.
23 24

Video Parameter Settings
Keep the computer connected to the receiver through LAN port, and keep
the receiver connected with transmitter normally.
Version:CM7074 V3.24
IP ETHADDR
192.168.1.110
GROUP
2222
Point to Point Bitrate
12000 Range(1000-25000)
RTSP Bitrate
Range(1000-15000)
SDI Audio Mode 01
Serial Baud Rate 2400 9600 19200 38400 57600 115200
File Upload: 选择文件 未选择任何文件 (Select A Local File)
Save the configuration and then reboot... 软件升级： 选择文件
1点击保存
2
Save Environment
1
2
Transmitter IP address(Can be changed)
Transmitter ID (four devices correspond to 1111, 2222, 3333 and 4444, respectively)
Transmission bitrate
RTSP streaming bitrate
Serial baud rate
Configuration Menu
4000
Configuration Menu
Version:CM3074 V3.24_edid_off
IP ETHADDR
192.168.1.120 Decoder IP address
Software version
GROUP
2222 Corresponding transmitter ID (1111/2222/3333/4444)
LATENCY_MODE
1
Serial Baud Rate 2400 9600 19200 38400 57600 115200 Serial baud rate
File Upload: 选择文件 未选择任何文件 (Select A Local Fi l e )
Save the configuration and then reboot... 软件升级： 选择文件
1点击保存
2
Save Environment
1
2
Software upgrade
Click Save to complete the upgrade
25 26
Open internet browser, and enter transmitter's encoder or receiver's
decoder IP address in the address bar to enter the parameter settings page.
Transmitter：
Receiver:

Two antennas 2x2 MIMO
Protocolmode TDD
33dBm
1000m/3300ft
70ms
Video bitrate 1-15Mbps
Streaming
transmission protocol RTSP
720p50,720p59.94,720p60
1080i50,1080i59.94,1080i60,1080p23.98,1080p24,
1080p25,1080p29.97,1080p30,1080p50,1080p59.94,1080p60
SMPTE 296M 720p50,720p59.94,720p60
SMPTE 274M 1080i50,1080i59.94,1080i60,1080p23.98,1080p24,
1080p25,1080p29.97,1080p30
SMPTE424M 1080p50,1080p59.94,1080p60
Power consumption Approx. 12W for transmitters Approx. 7W for receivers.
Operating voltage 7-36V
Temperature -10-50℃
Product Specifications
ITEM TX:7074/7074A RX:3074/3074A
Antenna
Transmission Power
Transmission Distance
Transmission Delay
Video Format
SDI：
HDMI ：
Audio Format
Frequency
SDI/HDMI embedded audio PCM sampling rate : 48KHz, 16bit
1.4GHz(7074+3074) 800MHz/700MHz(7074A+3074A)
Cautions
1. Environmental factors that affect wireless transmission
The following scenarios, which may result in pauses or noises,
can be problematic for the device.
a. Walls, large metal plates can pose a problem for the device. Avoid them if
possible or place the device in an optimal spot.
b. In crowded space, it is highly recommended to place the transmitter in a
higher position, approximately 1.5-2.5 meters and the receiver 2-3 meters
above the ground.
c. Do not place the transmitter or the receiver inside any metal enclosure,
which will severely affect transmission. If such case is inevitable, please
at least extend the antenna out of the enclosure.
2. Cabling
a. Please note that the HDMI ports are not hot pluggable.
b. Preferably, please first try connecting the receiver to the video source,
and receiver to monitor both via HDMI cable.
3. Device installation
a. Please make sure you install the antennas first before you set up the
device to avoid damage.
b. Adjust the antennas out to 45° angle and achieve the best gain.
c. Please make sure antennas are properly installed before powering
on the device.
27 28

Troubleshooting
1. Mosaic or lagging on the screen
2. Black screen
a. Check to see if “connecting to transmitter”or “link connected
to transmitter, please check video source”appears on the screen.
If, instead, “link connected to transmitter, please check video source”
appears, please make sure the transmitter is properly connected to
the corresponding SDI/HDMI cable.
b. If blank or black screen appears after resolution switch, please
disconnect and reconnect the HDMI cable to the transmitter or
the receiver.
strength symbol does not appear. Check by following the instructions
in Section 16.1. If the signal strength symbol does appear but the VIDEO
symbol doesn’t, please check the video source and the corresponding
SDI/HDMI cables; If both symbols appear, but the switch goes black or
blank, please check the SDI/HDMI cable between the receiver and the
switch, change the resolution to 1080i 50 or 720p 50 to see if it is normal.
You can also check by connecting the SDI/HDMI cable to other monitor
to see if it is normal.
4. Green flicker in output
Make sure the HDMI ports of both the transmitter and receiver are
secured or tightly connected. Make sure the HDMI port of the camera
is also properly connected. If it is still not solved, please replace the
HDMI cables.
Please confirm if the following conditions have already occurred:
a. The transmitter is set up on a camera or handle, it should be 1.5-2m
above the ground, and the photographer ’s body should not obstruct
the antenna’s cylinder. The receiver should be set up 2m or more
above the ground.
b. The antenna is tightened.
3. No output when the transmitter and the switch are connected
Check the signal strength and video symbol on the OLED screen of both
the transmitter and the receiver. They are not connected if the signal
29 30